If you're stuck and can't find any other way to make progress, try making a educated guess and see where it takes you. Don't be afraid to make guesses: While it's generally best to avoid making guesses in sudoku, sometimes it's necessary in order to make progress in an evil level puzzle.

Some examples include the 'X-Wing' technique, the 'Swordfish' technique, and the 'Hidden Pair' technique.

Make use of advanced solving techniques: There are a number of advanced solving techniques that can be useful when working on evil level sudoku puzzles.

Look for patterns and symmetries: Evil level sudoku puzzles may have more complex patterns or symmetries than other levels, so it can be helpful to look for these and use them to your advantage.

This will help you get a foothold in the puzzle and make it easier to solve the more difficult squares later on.

Start with the easiest squares: Begin by filling in the squares that have the fewest possible options.

Ultimately, the level of difficulty of a sudoku puzzle will depend on the specific characteristics of the puzzle and the solver's skill and experience. For example, some sources may consider 'expert' level to be the most difficult, while others may consider 'diabolical' or 'fiendish' to be the most challenging level. However, it is worth noting that there is no official standard or definition for the difficulty levels of sudoku puzzles, and different sources may use different names or criteria to define the various levels. Evil level sudoku puzzles may also have more complex patterns or symmetries than other levels, which can make them even more challenging to solve. Evil level sudoku is typically characterized by having fewer clues, or starting numbers, than other levels of sudoku, which means that the solver must make more inferences and deductions to fill in the blank squares. It is generally accepted that evil level sudoku is the most difficult level of sudoku, at least among the levels that are commonly used in sudoku puzzles.

If you're up for the challenge and have a knack for solving puzzles, evil level sudoku might be just the activity for you! Overall, evil level sudoku is a type of puzzle that is meant to test the limits of a solver's skills and provide a real challenge for experienced players. However, that doesn't mean that it's impossible! With the right strategies and techniques, and a little bit of patience and persistence, even the most challenging evil level sudoku puzzles can be solved. Solving an evil level sudoku puzzle requires a high level of skill and experience, and it may be a time-consuming process. It is typically characterized by having fewer clues, or starting numbers, than other levels of sudoku, which means that the solver must make more inferences and deductions to fill in the blank squares. Evil level sudoku is a type of sudoku puzzle that is considered to be extremely difficult to solve.

Hard sudoku puzzle